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| 型号： | RNCP0805FTD1K78 |
| 厂商： | Stackpole Electronics Inc |
| 文件页数： | 3/3页 |
| 文件大小： | 0K |
| 描述： | RES 1.78K OHM 1/4W 1% 0805 SMD |
| 产品培训模块： | RNCP Series Thin Film Resistors |
| 产品变化通告： | Global Part Number Change 9/Aug/2010 |
| 产品目录绘图： | RNCP Series |
| 特色产品： | RNCP Series High Power Thin Film Resistors |
| 标准包装： | 1 |
| 系列： | RNCP |
| 电阻（欧姆）： | 1.78k |
| 功率（瓦特）： | 0.25W，1/4W |
| 复合体： | 薄膜 |
| 特点： | 抗硫化 |
| 温度系数： | ±100ppm/°C |
| 容差： | ±1% |
| 封装/外壳： | 0805（2012 公制） |
| 尺寸/尺寸： | 0.079" L x 0.050" W（2.00mm x 1.25mm） |
| 高度： | 0.024"（0.60mm） |
| 端子数： | 2 |
| 包装： | 标准包装 |
| 产品目录页面： | 2287 (CN2011-ZH PDF) |
| 其它名称： | RNCP0805FTD1K78DKR RNCP0805T11.78KFRDKR RNCP0805T11.78KFRDKR-ND |
RNCP Series
High Power Anti-Sulfur Thin Film Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
High Power Chip Resistors and Thermal Management
Stackpole has developed several surface mount resistor series in addition to our current sense resistors,
which have had higher power ratings than standard resistor chips. This has caused some uncertainty and
even confusion by users as to how to reliably use these resistors at the higher power ratings in their designs.
The data sheets for the RHC, RMCP, RNCP, CSR, CSRN, CSRF, CSS, and CSSH state that the rated
power assumes an ambient temperature of no more than 100 degrees C for the CSS / CSSH series and 70
degrees C for all other high power resistor series. In addition, IPC and UL best practices dictate that the
combined temperature on any resistor due to power dissipated and ambient air shall be no more than 105C.
At first glance this wouldn’t seem too difficult, however the graph below shows typical heat rise for the CSR
? 100 milliohm at full rated power. The heat rise for the RMCP and RNCP would be similar. The RHC with
its unique materials, design, and processes would have less heat rise and therefore would be easier to
implement for any given customer.
The 102 degrees C heat rise shown here would indicate there will be additional thermal reduction techniques
needed to keep this part under 105C total hot spot temperature if this part is to be used at 0.75 watts of
power. However, this same part at the usual power rating for this size would have a heat rise of around 72
degrees C. This additional heat rise may be dealt with using wider conductor traces, larger solder pads and
land patterns under the solder mask, heavier copper in the conductors, vias through PCB, air movement, and
heat sinks, among many other techniques. Because of the variety of methods customers can use to lower
the effective heat rise of the circuit, resistor manufacturers simply specify power ratings with the limitations
on ambient air temperature and total hot spot temperatures and leave the details of how to best accomplish
this to the design engineers. Design guidelines for products in various market segments can vary widely so it
would be unnecessarily constraining for a resistor manufacturer to recommend the use of any of these
methods over another.
Note:
The final resistance value can be affected by the board layout and assembly process, especially the size of the
mounting pads and the amount of solder used. This is especiall y notable for resistance values ≤ 50 mΩ.
This should be taken into account when designing.
Rev Date: 10/15/2013
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
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相关代理商/技术参数 |
参数描述 |
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| RNCP0805FTD1K82 | 功能描述:RES 1.82K OHM 1/4W 1% 0805 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:RNCP RoHS指令信息:3-1879335-7 Statement of Compliance 标准包装:1,000 系列:CPF, Neohm 电阻（欧姆）:51.1 功率（瓦特）:0.063W，1/16W 复合体:薄膜 特点:- 温度系数:±50ppm/°C 容差:±1% 封装/外壳:0603（1608 公制） 尺寸/尺寸:0.061" L x 0.031" W（1.55mm x 0.80mm） 高度:0.022"（0.55mm） 端子数:2 包装:带卷 (TR) 其它名称:3-1879335-7-NDA102292TRCPF0603F51R1C1 |
| RNCP0805FTD1R00 | 功能描述:RES 1 OHM 1/4W 1% 0805 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:RNCP RoHS指令信息:3-1879335-7 Statement of Compliance 标准包装:1,000 系列:CPF, Neohm 电阻（欧姆）:51.1 功率（瓦特）:0.063W，1/16W 复合体:薄膜 特点:- 温度系数:±50ppm/°C 容差:±1% 封装/外壳:0603（1608 公制） 尺寸/尺寸:0.061" L x 0.031" W（1.55mm x 0.80mm） 高度:0.022"（0.55mm） 端子数:2 包装:带卷 (TR) 其它名称:3-1879335-7-NDA102292TRCPF0603F51R1C1 |
| RNCP0805FTD200R | 功能描述:RES 200 OHM 1/4W 1% 0805 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:RNCP 产品目录绘图:Thick-Film 5% Top Thick-Film 5% Side 标准包装:10 系列:CRCW - 汽车 电阻（欧姆）:110 功率（瓦特）:0.063W，1/16W 复合体:厚膜 特点:- 温度系数:±200ppm/°C 容差:±5% 封装/外壳:0402（1005 公制） 尺寸/尺寸:0.039" L x 0.020" W（1.00mm x 0.50mm） 高度:0.016"（0.40mm） 端子数:2 包装:Digi-Reel® 产品目录页面:2219 (CN2011-ZH PDF) 其它名称:541-110JDKR |
| RNCP0805FTD20K0 | 功能描述:RES 20K OHM 1/4W 1% 0805 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:RNCP 产品培训模块:Intro to Thin Film Chip Resistors 产品目录绘图:RR Series Top, Side RR Series Thin Film Current Flow Thick Film Current Flow 标准包装:10,000 系列:RR 电阻（欧姆）:12k 功率（瓦特）:0.063W，1/16W 复合体:薄膜 特点:- 温度系数:±25ppm/°C 容差:±0.5% 封装/外壳:0402（1005 公制） 尺寸/尺寸:0.039" L x 0.020" W（1.00mm x 0.50mm） 高度:0.016"（0.40mm） 端子数:2 包装:带卷 (TR) 产品目录页面:2213 (CN2011-ZH PDF) 其它名称:RR0510P123DRR05P12.0KDTR |
| RNCP0805FTD20R0 | 功能描述:RES 20 OHM 1/4W 1% 0805 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:RNCP RoHS指令信息:3-1879335-7 Statement of Compliance 标准包装:1,000 系列:CPF, Neohm 电阻（欧姆）:51.1 功率（瓦特）:0.063W，1/16W 复合体:薄膜 特点:- 温度系数:±50ppm/°C 容差:±1% 封装/外壳:0603（1608 公制） 尺寸/尺寸:0.061" L x 0.031" W（1.55mm x 0.80mm） 高度:0.022"（0.55mm） 端子数:2 包装:带卷 (TR) 其它名称:3-1879335-7-NDA102292TRCPF0603F51R1C1 |
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